all biological traits need two kinds of explanation, both proximate and evolutionary. The proximate explanation for a disease describes what is wrong in the bodily mechanism of individuals affected by it. An evolutionary explanation is completely different. Instead of explaining why people are different, it explains why we are all the same in ways that leave us vulnerable to disease. Why do we all have wisdom teeth, an appendix, and cells that can divide out of control?[78]
China also developed a large body of traditional medicine. Much of the philosophy of traditional Chinese medicine derived from empirical observations of disease and illness by Taoist physicians and reflects the classical Chinese belief that individual human experiences express causative principles effective in the environment at all scales. These causative principles, whether material, essential, or mystical, correlate as the expression of the natural order of the universe.
Kitasato Shibasaburō (1853–1931) studied bacteriology in Germany under Robert Koch. In 1891 he founded the Institute of Infectious Diseases in Tokyo, which introduced the study of bacteriology to Japan. He and French researcher Alexandre Yersin went to Hong Kong in 1894, where; Kitasato confirmed Yersin's discovery that the bacterium Yersinia pestis is the agent of the plague. In 1897 he isolates and described the organism that caused dysentery. He became the first dean of medicine at Keio University, and the first president of the Japan Medical Association.[147][148]
During the 19th century medicine made rapid progress. In 1816 a man named Rene Laennec invented the stethoscope. At first he used a tube of paper. Later he used a wooden version. In 1822 a trapper named Alexis St Martin was shot in the stomach. The wound healed leaving a hole into his stomach. A doctor named William Beaumont found out how a stomach works by looking through the hole.
James pieces together the last twenty five to forty years from the elders of which functional medicine was created. The basis of Functional Medicine is in history of Naturopathic, Chiropractic and Acupuncture along with the nutritional and medical research worlds. The new terminology fits within the paradigm of medicine and allows those in the medical field to grasp the root concepts that have been spoken for the last several hundred to four thousand years. Only now is the science finally catching up to what has been spoken by the elders in those professions.